As if that had anything to do with it? Twitter under Musk has been a disaster, I’m not surprised companies are withdrawing from it. A lot of dropping off who were once very active users too, and basically no part of any of that has anything to do with the ADL.
And why did they lobby? It’s not like Twitter has become some utopia since he bought it. It’s gone to shit and is increasingly filled with a huge amount of racist and antisemitic sentiment. After that, there’s (exaggerated) a billion crypto scams.
Could be millions of reasons. Maybe they don't like way Elon is running the place. Maybe they lost contacts in purges Elon did. They disagree with people he let onto the platform.